@article{BUMI_2007_8_10B_2_a13,
     author = {Ge, Ying and Shou, Lin},
     title = {On {Ponomarev-Systems}},
     journal = {Bollettino della Unione matematica italiana},
     pages = {455--467},
     publisher = {mathdoc},
     volume = {Ser. 8, 10B},
     number = {2},
     year = {2007},
     zbl = {1143.54003},
     mrnumber = {2339454},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2007_8_10B_2_a13/}
}